WO2002033248A2 - Soupape d"injection de carburant - Google Patents

Soupape d"injection de carburant Download PDF

Info

Publication number
WO2002033248A2
WO2002033248A2 PCT/DE2001/003946 DE0103946W WO0233248A2 WO 2002033248 A2 WO2002033248 A2 WO 2002033248A2 DE 0103946 W DE0103946 W DE 0103946W WO 0233248 A2 WO0233248 A2 WO 0233248A2
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel injection
extension
injection valve
fuel
Prior art date
Application number
PCT/DE2001/003946
Other languages
German (de)
English (en)
Other versions
WO2002033248A3 (fr
Inventor
Norbert Keim
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP01987847A priority Critical patent/EP1328724A2/fr
Priority to JP2002536205A priority patent/JP2004511720A/ja
Publication of WO2002033248A2 publication Critical patent/WO2002033248A2/fr
Publication of WO2002033248A3 publication Critical patent/WO2002033248A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/06—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being furnished at seated ends with pintle or plug shaped extensions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices

Definitions

  • the invention relates to a fuel injector according to the type of the main claim.
  • Inward opening fuel injection valves with swirl generation are known for example from DE 198 15 800 AI.
  • a 'tzMech in a Ventilsi befindliches component of the formed by valve closing body and the valve seat body sealing seat is generated downstream in the fuel flow open, fuel injection valve, a swirl, which results in a fanning out of the ejected fuel jet.
  • the fuel already flows through a swirl disk during the opening process, so that a swirl is formed during the entire injection process.
  • a " peripheral speed " is applied to the fuel immediately when the fuel is sprayed off.
  • Both fuel injectors move the valve needle and the valve closing body connected to it between two stroke-limiting stops.
  • the solenoid coil When the solenoid coil is not energized, the valve seat surface forms the downstream stroke limitation in the idle state of the fuel injector.
  • the valve needle When the fuel injection valve is open, the valve needle, together with the valve closing body, is lifted from the valve seat surface until the movement of the armature is limited on an upstream contact surface.
  • the gap between the armature and the associated contact surface must be observed exactly.
  • the component tolerances add up to the armature. Added to this are the component tolerances summed up from the opposite side of the valve up to the contact surface.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the stroke limitation of the valve closing body for both end positions is realized in one component. Both contact surfaces serve as counter bearings for the valve closing body and are arranged in the valve seat body.
  • the stroke setting can therefore be determined solely by the length of an extension on the valve closing body, which determines the limitation of the stroke when the solenoid coil is energized.
  • the extension is mounted when the valve closing body is in contact with the valve seat surface. This makes it very easy to check the set stroke.
  • Two flow paths are formed when the fuel injector is opened. For one thing, the fuel is already flowing. through the fuel channels into the central spray opening of the extension. In addition, some of the fuel flows outside the extension without causing swirl formation. This can be used to generate a pre-jet ⁇ which deviates from the main beam of his Abspritztruckes fully open fuel injector terms. Fuel injection valves that are able to implement a partial stroke can also specifically change the geometry of the injected fuel jet during the entire injection process by enabling the second flow path. Furthermore, the dead volume is very low. After the fuel injector is closed, there is no dripping. A swirl is formed immediately before the fuel is sprayed off. The lack of flow diversion leads to a reduction in the sample spread.
  • Fig. 1 shows a schematic partial section through an embodiment of an inventive
  • Fig. 2 is a schematic partial section in section II of Fig. 1 through the first embodiment of an inventive
  • FIG. 3 shows a schematic partial section in section II of FIG. 1 through a second exemplary embodiment of a fuel injection valve according to the invention
  • Fig. 4 is a schematic section in section II of Fig. 1 through a third embodiment of a fuel injector according to the invention.
  • FIG. 5 shows a schematic section in section II of FIG. 1 through a fourth embodiment of a fuel injection valve according to the invention.
  • the fuel injection valve 1 is designed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • Fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injector 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injector 1 in the exemplary embodiment is an electromagnetically actuated fuel injection valve 1, which has a spray opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnetic circuit.
  • a magnet coil 10 is wound on a coil support 12 and encapsulated by a coil housing 11.
  • the coil carrier 12 itself rests on an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
  • the valve needle 3 is in a valve needle guide 14, which is disc-shaped and guided in a guide disc 31.
  • An anchor 20 is located on the downstream side of a disk 15.
  • This armature stands over a flange 21 non-positively connected to the valve needle 3, which is connected to the flange 21 by a weld 22.
  • a restoring spring 23 is supported on the flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
  • Fuel channels 30a to 30c run in the valve needle guide 14, in the armature 20 and in the guide disk 31, which guide the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the sealing seat.
  • the fuel injector 1 is sealed by a seal 28 against a distribution line, not shown.
  • the armature 20 in the idle state of the fuel injector 1, the armature 20 is acted upon by the return spring 23 against the stroke direction via the flange 21 on the valve needle 3 in such a way that the valve closing body 4 is held in sealing contact with the valve seat surface 6 and the valve closing body 4 is in its downstream stroke-limiting end position.
  • the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field which moves the armature 20 in the stroke direction counter to the spring force of the return spring 23, the stroke being predetermined by a working gap 27 in the rest position between an extension 34 and the valve seat body 5.
  • the armature 20 takes the flange 21, which is welded to the valve needle 3, and thus also the valve needle 3 in the lifting direction.
  • valve closing body 4 which is operatively connected to the valve needle 3, lifts off the valve seat surface 6 and the fuel which reaches the sealing seat via the fuel channels 30a to 30c flows past the valve closing body 4 through swirl channels 33 into the spray opening 7 and is sprayed off.
  • FIG. 2 An embodiment of a fuel injector 1 according to the invention is shown enlarged in FIG. 2 in area II of FIG. 1.
  • the valve seat body 5 forms a first stroke limitation by the valve closing body 4 resting on the valve seat surface 6.
  • the valve seat body 5 is penetrated by an extension 34, which has a downstream radial extension 35, which forms a second stroke limitation with the valve seat body 5 when the solenoid 10 is excited.
  • a through opening in the valve seat body 5 Downstream of the valve seat surface 6, there is a through opening in the valve seat body 5, which has a contact surface 32 designed as a radial extension to the downstream side of the valve seat body 5.
  • the extension 34 ⁇ penetrates the through opening and is connected to the Ventilsch Strukturk ⁇ rper 4, for example by welding or brazing, force-fitting manner.
  • a spray opening 7 is introduced, which is connected by one or more swirl channels 33 to the gap formed between the valve closing body 4 and the valve seat surface 6 when the fuel injection valve 1 is open.
  • the swirl channels 33 preferably have a tangential component.
  • penetrating extension 34 has a sleeve-shaped portion 36 which is sized in length so that the protrusion 34 is formed between the abutment surface 32 of the Ventilsitzkorpers 5 • and the radial extension in the resting state of fuel injector 1, a working gap 27th
  • the axial extension of the working gap 27 defines the maximum stroke of the valve closing body 4 in relation to the valve seat surface 6.
  • the radial extent of the through hole 37 is greater than the radial expansion of the sleeve-shaped portion 36 of the projection 34 upstream of its radial enlargement 35. 'energizing the solenoid 10 of the valve closure member 4 lifts off from valve seat surface 6, and the flow path for the fuel-free.
  • the fuel flows both through the swirl channels 33 and through the gap 38 formed between the valve seat body 5 and the extension 34 and is sprayed out of the spray opening 7 or the working gap 27.
  • the working gap 27 between the radial extension 35 of the extension 34 and the contact surface 32 of the valve seat body 5 is increasingly reduced and the fuel flow through the working gap 27 is reduced.
  • the radial extension 35 is in contact with the contact surface 32.
  • the contact surface 32 and the radial extension 5 preferably have corresponding geometries, so that the radial extension 35 interacts with the contact surface 32 to form a sealing seat.
  • the flow path of the fuel through the working gap 27 is now closed and, when fully opened, the entire sprayed fuel is swirled.
  • the spray pattern can be influenced over the entire injection process.
  • the valve closing body 4 can be raised over only a part of the maximum possible stroke. Accordingly, the working gap 27 between the radial extension 35 and the contact surface 32 opened to different degrees and changes the amount of fuel sprayed without swirl, which leads to a change in the spray pattern.
  • FIG. 3 Another embodiment of a fuel injector 1 according to the invention is shown in FIG. 3.
  • the passage opening 37 is dimensioned relative to the sleeve-shaped section 36 of the extension 34 so that the gap 38 formed between the components is hydraulically sealed.
  • the amount of fuel sprayed off is determined by the changing coverage of the swirl channels 33 by the valve seat body .5 in the region of the passage opening 37.
  • the swirl channels 33 are to be selected according to the desired behavior during opening. They can be introduced as bores or as slots with variable geometry. Different positioning of the individual swirl channels 33 in the flow direction is also conceivable. The complete flow cross section is thus released successively with the stroke of the valve closing body 4 and the associated extension 34.
  • FIG. 4 shows an embodiment with a one-piece design of valve needle 3 and extension 35 on a fuel injection valve 1 without forming a second flow path.
  • the spherical valve closing body 4 has a central recess 40 which is penetrated by the valve needle 3.
  • the spray opening 7 is introduced, for example, as a bore in the downstream end of the valve needle 3 in the region of the extension 34. By designing the spray opening 7 as a blind hole, the dead volume is limited and dripping of fuel after the spraying process has ended prevented.
  • the position of the valve closing body 4 is preferably fixed by welding to the valve needle 3.
  • the welded connection 39 can be realized by welding points, which are distributed over the circumference of the valve needle 3, as well as a circumferential weld seam.
  • FIG. 5 shows a variant of the exemplary embodiment from FIG. 4 with a hollow valve needle 3.
  • the valve closing body 4 is in turn pushed onto the valve needle 3 and welded.
  • the valve needle 3 is designed as a hollow needle to reduce the moving mass.
  • the valve needle 3 is closed upstream. This can e.g. at their upstream end by welding. Due to the tubular geometry of the valve needle 3, there is no need to introduce the spray opening 7 in a separate manufacturing step.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L"invention concerne une soupape d"injection de carburant (1) débouchant vers l"intérieur, à limitation de course, destinée à des systèmes d"injection de carburant de moteurs à combustion interne. Cette soupape d"injection de carburant comprend un obturateur (4), qui est en liaison active avec un pointeau de soupape (3) et qui coopère avec une surface de siège de soupape (6) d"un corps de siège de soupape (5) pour créer une zone étanche. En aval de cette zone étanche, un embout (34) est monté sur l"obturateur (4) et présente une partie (36) en forme de douille qui s"étend à travers une ouverture de passage (37) ménagée dans le corps de siège de soupape (5). Ledit embout (34) présente, à son extrémité aval, une partie radialement élargie (35) qui, au repos, se trouve à une certaine distance axiale d"une surface d"appui (32) formée dans le corps de siège de soupape (5), et qui est plus grande que le plus petit diamètre de l"ouverture de passage (37).
PCT/DE2001/003946 2000-10-20 2001-10-19 Soupape d"injection de carburant WO2002033248A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01987847A EP1328724A2 (fr) 2000-10-20 2001-10-19 Soupape d'injection de carburant
JP2002536205A JP2004511720A (ja) 2000-10-20 2001-10-19 燃料噴射弁

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000152146 DE10052146A1 (de) 2000-10-20 2000-10-20 Brennstoffeinspritzventil
DE10052146.0 2000-10-20

Publications (2)

Publication Number Publication Date
WO2002033248A2 true WO2002033248A2 (fr) 2002-04-25
WO2002033248A3 WO2002033248A3 (fr) 2002-08-08

Family

ID=7660518

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/003946 WO2002033248A2 (fr) 2000-10-20 2001-10-19 Soupape d"injection de carburant

Country Status (4)

Country Link
EP (1) EP1328724A2 (fr)
JP (1) JP2004511720A (fr)
DE (1) DE10052146A1 (fr)
WO (1) WO2002033248A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2065590A1 (fr) * 2007-11-29 2009-06-03 Delphi Technologies, Inc. Appareil et procédé de combustion bimodal
US20160177905A1 (en) * 2013-08-19 2016-06-23 Kangmei Wang Centrifugal Conical-Spray Nozzle
DE102016221071A1 (de) 2016-10-26 2018-04-26 Ford Global Technologies, Llc Injektor für eine mit einem gasförmigen und/oder flüssigen Kraftstoff betriebene Brennkraftmaschine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1498601A1 (fr) * 2003-07-16 2005-01-19 Delphi Technologies, Inc. Injecteur de carburant
DE102004036085A1 (de) * 2004-07-24 2006-02-16 Volkswagen Ag Kraftstoffeinspritzventil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131499C1 (en) 1991-09-21 1993-04-08 Robert Bosch Gmbh, 7000 Stuttgart, De IC engine fuel injection valve - has ring gap between downstream continuation of sealing and seating surfaces of nozzle
DE19815800A1 (de) 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387790A (en) * 1967-04-11 1968-06-11 Bosch Arma Corp Fuel injection nozzle
DE3311138A1 (de) * 1983-03-26 1984-10-04 L'Orange GmbH, 7000 Stuttgart Kraftstoffeinspritzanlage fuer eine brennkraftmaschine
BR9506196A (pt) * 1994-05-10 1996-04-23 Bosch Gmbh Robert Aparelho e prosesso para a ajustagem de um curso de valvula
DE19633260A1 (de) * 1996-08-17 1998-02-19 Bosch Gmbh Robert Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors
DE19839632A1 (de) * 1998-08-31 2000-03-02 Siemens Ag Kraftstoffeinspritzdüse mit Hubbegrenzung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131499C1 (en) 1991-09-21 1993-04-08 Robert Bosch Gmbh, 7000 Stuttgart, De IC engine fuel injection valve - has ring gap between downstream continuation of sealing and seating surfaces of nozzle
DE19815800A1 (de) 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2065590A1 (fr) * 2007-11-29 2009-06-03 Delphi Technologies, Inc. Appareil et procédé de combustion bimodal
US7685990B2 (en) 2007-11-29 2010-03-30 Delphi Technologies, Inc. Dual mode combustion apparatus and method
US20160177905A1 (en) * 2013-08-19 2016-06-23 Kangmei Wang Centrifugal Conical-Spray Nozzle
US10006427B2 (en) * 2013-08-19 2018-06-26 Kangmei Wang Centrifugal conical-spray nozzle
DE102016221071A1 (de) 2016-10-26 2018-04-26 Ford Global Technologies, Llc Injektor für eine mit einem gasförmigen und/oder flüssigen Kraftstoff betriebene Brennkraftmaschine
DE102016221071B4 (de) 2016-10-26 2022-05-25 Ford Global Technologies, Llc Injektor für eine mit einem gasförmigen Kraftstoff betriebene Brennkraftmaschine

Also Published As

Publication number Publication date
EP1328724A2 (fr) 2003-07-23
WO2002033248A3 (fr) 2002-08-08
DE10052146A1 (de) 2002-05-08
JP2004511720A (ja) 2004-04-15

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